38918730 has 32 divisors (see below), whose sum is σ = 94011264. Its totient is φ = 10310976.

The previous prime is 38918723. The next prime is 38918753. The reversal of 38918730 is 3781983.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579 + ... + 8841.

It is an arithmetic number, because the mean of its divisors is an integer number (2937852).

Almost surely, 2^38918730 is an apocalyptic number.

38918730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38918730 is an abundant number, since it is smaller than the sum of its proper divisors (55092534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38918730 is a wasteful number, since it uses less digits than its factorization.

38918730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 38918730 is about 6238.4877975356. The cubic root of 38918730 is about 338.8854217249.

It can be divided in two parts, 3891 and 8730, that added together give a palindrome (12621).

The spelling of 38918730 in words is "thirty-eight million, nine hundred eighteen thousand, seven hundred thirty".